Fix spelling

documentation/index.html

@@ -450,7 +450,7 @@ AdminLTE/
   <h3 id="component-main-header">Main Header</h3>
   <p class="lead">The main header contains the logo and navbar. Construction of the
     navbar differs slightly from Bootstrap because it has components that Bootstrap doesn't provide.
-    The navbar can be constructed in two way. This an example for the normal navbar and next we will provide an example for
+    The navbar can be constructed in two ways. This an example for the normal navbar and next we will provide an example for
     the top nav layout.</p>
   <div class="box box-solid">
     <div class="box-body" style="position: relative;">